Self-oiling loose pulley.



H. A'. DAVIS.

SELF OILING LOOSE PULLEY.

APPLICATION rIL'nn mm a, 1907.

Patented Nov. 17, 1908.

HENRY A. DAVIS, OF DAVENPORT, IOWA.

SELF-OILIN G LOOSE PULLEY.

Specification of Letters Patent.

Patented Nov. 1'7, 1908.

Application filed June 8, 1907. Serial No. 378,017.

To all whom it may concern:

Be it known that I, HENRY A. DAVIS, a i citizen of the United States ofAmerica, residing at Davenport, in the county of Scott i and State ofIowa, have invented new and useful Improvements in Self-Oiling Loose jPulleys, of which the following is the specification.

My invention relates to improvements in loose pulleys in which a rim issecured to inwardly projecting hubs revolubly mounted upon a shaft; andthe objects of my invention are, first, to provide simple and effectivemeans for oiling such pulleys; second, to provide means forautomatically returning the oil to the shaft after it has been carriedaway by centrifugal force; third, to provide simple and effective meansto prevent the wear of a shaft upon which a loose pulley is mounted. Iattain these objects by the mechanism illustrated in the accompanyingdrawings, in which Figure I is a side elevation of the pulley showinginwardly projecting hub and the oiling block in dotted lines; Fig. II isa front elevation of one hub and of a portion of the shaft but shows theother hub and its attached side plate, and the rim and oiling block, insection on the line XX of Fig. I; Fig. III is a side elevation showingin clotted lines the hub with the oilmg block altered to form a ring;Fig. IV is a vertical cross section on the line XX of Fig. III, butshows one hub in full lines instead of in section.

Similar letters refer to similar parts throughout the several views.

The rim A, is composed of hard pressed fiber or other suitable materialand must be made impervious to oil either by the composition of thematerial used or by lining the inside of the rim with some substanceimpervious to oil.

channels F, leading from the annular chan nels K, to connect with theoil chamber J, within the pulley. The oil block D, is revolubly mountedeccentrically upon the shaft C, intermediate the hubs B, and has itslower end weighted to keep it in position and its upper end extended soas to almost touch the inner side of the rim A. Channels E, are formedin the extended end of the oil block D, to conduct the oil to thechannels G, in the hubs.

Referring to Figs. III and IV the exnded end may be taken from the oilblock D shown in Figs. I and II, and the interior of the oil block boredout to form a ring which will rest upon the interior of the rim A, andcarry the oil from the rim to the axle, from which it will travelthrough the channels G, and F, and back to the ring D, along the innerface of the rim A.

The principle of my invention is the use of centrifugal force to carrythe oil away from the shaft and into contact with the oil block and theuse of the oil block to conduct the oil back to the channels G and G, inthe hubs.

It is a well known fact that great difficulty 1s experienced inpreventing loose pulleys from cutting out the axles upon which theyrevolve and the use of my invention secures perfect oiling of such axlesand thereby lengthens the life of such axles and the loose pulleysmounted thereon.

I have described two forms of oil block but it is obvious that variousequivalent means for conducting the oil from the rim back to the shaftmay be used without departing from the principle of my invention.

It is designed to use a comparatively large quantity of oil in thispulley so that there will be a continuous circulation of oil through thevarious ducts or channels; and when desired, the inner face of the rimmay be sloped from each side toward the middle so that the centrifugalforce will cause the oil to collect at the middle of the rim. The oilnecessary to operate this pulley may be put in when the pulley ismounted upon the axle and put together, or a suitable opening, as at P,may be provided for the admission of oil, with a suitable stopper, Q, toclose the opening.

In operation, the weighted end of the oil block D, keeps it practicallystationary and when the ring D, is used, it ,rotates from contact withthe rim. Perforations as shown at 0, may be provided in the ring tofacilitate the passage of the oil to the shaft C.

\Vhat I claim and desire to secure by Letters Patent, is

1. A loose pulley comprising a rim, and side plates and inwardlyprojecting hubs, formed integral with the side plates and spaced apart,having a plurality of longi tudinal channels located in their innersurfaces parallel with axle openings in the hubs and in line with theaxle, oblique radial channels extending from the inner ends of thelongitudinal channels to the peripheries of the hubs, and annularchannels in the inner surfaces of the hubs at the juncture of thelongitudinal and oblique radial channels, and an eccentric oiling blockloosely positioned between the inner ends of the hubs.

2. A loose pulley comprising a rim, and

side plates, and inwardly projecting hubs, forined integral with theside plates and spaced apart, having a plurality of longitudinalchannels located in their inner surfaces parallel with axle openings inthe hubs and in line with the axle, oblique radial channels extendingfrom the inner ends 0 the longitudinal channels to the peripheries ofthe hubs, and annular channels in the inner surfaces of the hubs at thejuncture of the longitudinal and oblique radial channels, and aneccentric oiling block in the form of a ring loosely positioned betweenthe inner ends of the hubs and resting thereon and adapted to contactwith the inner face of the rim.

HENRY A. DAVIS.

\Vitnesses WVINNIFRED J earns, CLARA lVILI-IELM.

